# services/notification_service.py
class NotificationService:
    @staticmethod
    def send_cc_notification(instance_id, users):
        print(f"📨 发送抄送通知给 {len(users)} 位用户，流程实例ID: {instance_id}")

    @staticmethod
    def send_approval_reminder(instance_id, users):
        print(f"🔔 发送审批提醒给 {len(users)} 位审批人，流程实例ID: {instance_id}")
